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HDFS-2188. Make FSEditLog create its journals from a list of URIs rather than NNStorage. Contributed by Ivan Kelly. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1185354 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jitendra Nath Pandey 2011-10-17 20:23:57 +00:00
parent 15a1d9af19
commit 8d4842383e
6 changed files with 112 additions and 20 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -129,6 +129,9 @@ Trunk (unreleased changes)
file or creating a file without specifying the replication parameter.
(szetszwo)
HDFS-2188. Make FSEditLog create its journals from a list of URIs rather
than NNStorage. (Ivan Kelly via jitendra)
Release 0.23.0 - Unreleased
INCOMPATIBLE CHANGES

52
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java
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@ -18,10 +18,11 @@
package org.apache.hadoop.hdfs.server.namenode;
import static org.apache.hadoop.hdfs.server.common.Util.now;
import java.net.URI;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.apache.commons.logging.Log;
@ -42,9 +43,11 @@ import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.RemoteEditLogManifest;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.security.token.delegation.DelegationKey;
import org.apache.hadoop.conf.Configuration;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
/**
* FSEditLog maintains a log of the namespace modifications.
@ -122,16 +125,53 @@ public class FSEditLog {
}
};
final private Collection<URI> editsDirs;
/**
* Construct FSEditLog with default configuration, taking editDirs from NNStorage
* @param storage Storage object used by namenode
*/
@VisibleForTesting
FSEditLog(NNStorage storage) {
this(new Configuration(), storage, Collections.<URI>emptyList());
}
/**
* Constructor for FSEditLog. Add underlying journals are constructed, but
* no streams are opened until open() is called.
*
* @param conf The namenode configuration
* @param storage Storage object used by namenode
* @param editsDirs List of journals to use
*/
FSEditLog(Configuration conf, NNStorage storage, Collection<URI> editsDirs) {
isSyncRunning = false;
this.storage = storage;
metrics = NameNode.getNameNodeMetrics();
lastPrintTime = now();
if (editsDirs.isEmpty()) {
// if this is the case, no edit dirs have been explictly configured
// image dirs are to be used for edits too
try {
editsDirs = Lists.newArrayList(storage.getEditsDirectories());
} catch (IOException ioe) {
// cannot get list from storage, so the empty editsDirs
// will be assigned. an error will be thrown on first use
// of the editlog, as no journals will exist
}
this.editsDirs = editsDirs;
} else {
this.editsDirs = Lists.newArrayList(editsDirs);
}
this.journalSet = new JournalSet();
for (StorageDirectory sd : storage.dirIterable(NameNodeDirType.EDITS)) {
for (URI u : this.editsDirs) {
StorageDirectory sd = storage.getStorageDirectory(u);
if (sd != null) {
journalSet.add(new FileJournalManager(sd));
}
}
if (journalSet.isEmpty()) {
LOG.error("No edits directories configured!");
@ -139,6 +179,14 @@ public class FSEditLog {
state = State.BETWEEN_LOG_SEGMENTS;
}
/**
* Get the list of URIs the editlog is using for storage
* @return collection of URIs in use by the edit log
*/
Collection<URI> getEditURIs() {
return editsDirs;
}
/**
* Initialize the output stream for logging, opening the first
* log segment.

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java
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@ -120,7 +120,7 @@ public class FSImage implements Closeable {
storage.setRestoreFailedStorage(true);
}
this.editLog = new FSEditLog(storage);
this.editLog = new FSEditLog(conf, storage, editsDirs);
archivalManager = new NNStorageRetentionManager(conf, storage, editLog);
}
@ -150,8 +150,7 @@ public class FSImage implements Closeable {
"NameNode formatting should be performed before reading the image";
Collection<URI> imageDirs = storage.getImageDirectories();
Collection<URI> editsDirs = storage.getEditsDirectories();
Collection<URI> editsDirs = editLog.getEditURIs();
// none of the data dirs exist
if((imageDirs.size() == 0 || editsDirs.size() == 0)

26
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NNStorage.java
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@ -59,6 +59,7 @@ import org.apache.hadoop.net.DNS;
import com.google.common.base.Preconditions;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Lists;
/**
* NNStorage is responsible for management of the StorageDirectories used by
@ -154,7 +155,9 @@ public class NNStorage extends Storage implements Closeable {
storageDirs = new CopyOnWriteArrayList<StorageDirectory>();
setStorageDirectories(imageDirs, editsDirs);
// this may modify the editsDirs, so copy before passing in
setStorageDirectories(imageDirs,
Lists.newArrayList(editsDirs));
}
@Override // Storage
@ -298,6 +301,27 @@ public class NNStorage extends Storage implements Closeable {
}
}
/**
* Return the storage directory corresponding to the passed URI
* @param uri URI of a storage directory
* @return The matching storage directory or null if none found
*/
StorageDirectory getStorageDirectory(URI uri) {
try {
uri = Util.fileAsURI(new File(uri));
Iterator<StorageDirectory> it = dirIterator();
for (; it.hasNext(); ) {
StorageDirectory sd = it.next();
if (Util.fileAsURI(sd.getRoot()).equals(uri)) {
return sd;
}
}
} catch (IOException ioe) {
LOG.warn("Error converting file to URI", ioe);
}
return null;
}
/**
* Checks the consistency of a URI, in particular if the scheme
* is specified and is supported by a concrete implementation

18
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/FSImageTestUtil.java
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@ -42,10 +42,13 @@ import org.apache.hadoop.hdfs.server.namenode.FSImageStorageInspector.FSImageFil
import org.apache.hadoop.hdfs.server.namenode.NNStorage.NameNodeDirType;
import org.apache.hadoop.hdfs.util.MD5FileUtils;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.conf.Configuration;
import org.mockito.Mockito;
import org.mockito.Matchers;
import com.google.common.base.Joiner;
import com.google.common.collect.Lists;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.google.common.io.Files;
@ -106,7 +109,7 @@ public abstract class FSImageTestUtil {
Mockito.doReturn(type)
.when(sd).getStorageDirType();
Mockito.doReturn(currentDir).when(sd).getCurrentDir();
Mockito.doReturn(currentDir).when(sd).getRoot();
Mockito.doReturn(mockFile(true)).when(sd).getVersionFile();
Mockito.doReturn(mockFile(false)).when(sd).getPreviousDir();
return sd;
@ -128,6 +131,7 @@ public abstract class FSImageTestUtil {
// Version file should always exist
doReturn(mockFile(true)).when(sd).getVersionFile();
doReturn(mockFile(true)).when(sd).getRoot();
// Previous dir optionally exists
doReturn(mockFile(previousExists))
@ -143,6 +147,7 @@ public abstract class FSImageTestUtil {
doReturn(files).when(mockDir).listFiles();
doReturn(mockDir).when(sd).getCurrentDir();
return sd;
}
@ -170,11 +175,16 @@ public abstract class FSImageTestUtil {
assertTrue(logDir.mkdirs() || logDir.exists());
Files.deleteDirectoryContents(logDir);
NNStorage storage = Mockito.mock(NNStorage.class);
List<StorageDirectory> sds = Lists.newArrayList(
FSImageTestUtil.mockStorageDirectory(logDir, NameNodeDirType.EDITS));
StorageDirectory sd
= FSImageTestUtil.mockStorageDirectory(logDir, NameNodeDirType.EDITS);
List<StorageDirectory> sds = Lists.newArrayList(sd);
Mockito.doReturn(sds).when(storage).dirIterable(NameNodeDirType.EDITS);
Mockito.doReturn(sd).when(storage)
.getStorageDirectory(Matchers.<URI>anyObject());
return new FSEditLog(storage);
return new FSEditLog(new Configuration(),
storage,
ImmutableList.of(logDir.toURI()));
}
/**

16
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestEditLog.java
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@ -46,6 +46,7 @@ import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
import org.apache.hadoop.hdfs.server.common.Util;
import org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream;
import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory;
import org.apache.hadoop.hdfs.server.namenode.NNStorage.NameNodeDirType;
@ -861,8 +862,11 @@ public class TestEditLog extends TestCase {
* The syntax <code>[1,]</code> specifies an in-progress log starting at
* txid 1.
*/
private NNStorage mockStorageWithEdits(String... editsDirSpecs) {
private NNStorage mockStorageWithEdits(String... editsDirSpecs) throws IOException {
List<StorageDirectory> sds = Lists.newArrayList();
List<URI> uris = Lists.newArrayList();
NNStorage storage = Mockito.mock(NNStorage.class);
for (String dirSpec : editsDirSpecs) {
List<String> files = Lists.newArrayList();
String[] logSpecs = dirSpec.split("\\|");
@ -878,13 +882,17 @@ public class TestEditLog extends TestCase {
Long.valueOf(m.group(2))));
}
}
sds.add(FSImageTestUtil.mockStorageDirectory(
StorageDirectory sd = FSImageTestUtil.mockStorageDirectory(
NameNodeDirType.EDITS, false,
files.toArray(new String[0])));
files.toArray(new String[0]));
sds.add(sd);
URI u = URI.create("file:///storage"+ Math.random());
Mockito.doReturn(sd).when(storage).getStorageDirectory(u);
uris.add(u);
}
NNStorage storage = Mockito.mock(NNStorage.class);
Mockito.doReturn(sds).when(storage).dirIterable(NameNodeDirType.EDITS);
Mockito.doReturn(uris).when(storage).getEditsDirectories();
return storage;
}